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The Cambridge of eighteen hundred and ninety-six: a picture of the city and its industries fifty years after its incorporation (ed. Arthur Gilman) 1 1 Browse Search
Cambridge sketches (ed. Estelle M. H. Merrill) 1 1 Browse Search
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The Cambridge of eighteen hundred and ninety-six: a picture of the city and its industries fifty years after its incorporation (ed. Arthur Gilman), Financial and manufacturing. (search)
nto a disk. His father, Alvan Clark, assisted him, and the combined skill of father and son produced a five-inch reflecting telescope. Alvan Clark, the father, was born in Ashfield, Mass., in 1804, and was at this time a portrait painter; he had decided mechanical tastes, and at one time had worked as a fine-line engraver. Taking up his new work with ardor, he spent several years making glasses of gradually increasing size. The first recognition of his genius came from England. The Rev. W. R. Dawes, a leading amateur astronomer, gave him an order for a glass, which was immediately followed by an order for a second one. Mr. Clark commenced the construction of a telescope for the University of Mississippi, but on account of the outbreak of the Civil War, it was not delivered. It was afterwards sold to the Chicago Astronomical Society. He was awarded the Rumford medal for his approved method in locating errors and eliminating them by the method of local correction. His first
Cambridge sketches (ed. Estelle M. H. Merrill), chapter 11 (search)
o good that Mr. Clark asked permission to exhibit it to Professor Bond at Harvard Observatory. The exhibition was a failure, not from any defect in the glass, but because it was not suitably mounted. Mr. Clark found means of correcting the difficulty, but his merit remained unrecognized for many years. American observatories ordered their instruments from Germany, not dreaming that their wants could have been supplied by a master here at home. It was an English amateur astronomer, Rev. W. R. Dawes, who first appreciated the skill of the Clarks and brought them into notice. He found their glasses to be of remarkably fine quality, and began to give them orders. They made several telescopes for him, and as he was known to be an unusually good judge of telescopes, this attracted attention, and Mr. Clark obtained a tardy recognition in his own country. His first large order was for an eighteen and one-half inch glass for the University of Mississippi. This was three and one-half